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Old 02-17-2005, 07:17 PM
cwareham cwareham is offline
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Default Punching out a Cobra Jet to .070?

Hi Folks-

I put my hands on a 428 cobra jet block (69 casting,) but I have a bit of a problem....It's bored .060, and is going to need another .010 to get all the cylinders "right." currently, a couple of the cylinders are 2 thousands big and a couple are 3 thousandths big.

My question is this - understanding that I'm starting to push it, can I go .070 over on a cobra jet block? This engine will likely never see the far side of 5000 RPMs with the possible exception of dyno day...it's going to be a street motor with some relatively mild track time now and then. I picked the block up for a song, and I have most of the components to build the short block for a pretty good price....in other words, it's worth it for me to seriously consider it rather than dropping $800-$1000 on another 428 if I can get away with it.


All the best,
Chris
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